John Deere 420 Tractor Review & Specification

John Deere 420

John Deere 420 Tractor Review & Specification

John Deere
John Deere 420
Engine Type:
air-cooled horizontal-shaft opposed-twin
Transmission & Oil Capacity:
7.5 qts [7.1 L]
1983 - 1991
Fuel Type:

John Deere 420 is an all-around tractor suitable for all your garden work. This model from John Deere 400 was launched in  1956 and 55000 tractors were manufactured before its discontinuation in 1958.

The high demand for the John Deere 420 model resulted in the rebirth of this tractor after 25 years in 1983. And this time it was in production for 8 years from 1983 to1991. The reborn version came to the market with many modifications in its features. This made the John Deere 420 model a favorite tractor of all time.

This utility tractor is available in several configurations including standard, utility, crawler, general-purpose, hi-crop, and special. All the different versions have unique wheel configurations.

The John Deere 420 model comes with a 20HP Onan 2-cylinder gas engine and 2WD hydrostatic Sundstrand 90 transmission. It is a popular garden tractor and many owners claim it to be the best garden tractor ever built. This big tractor weighs 899 lbs. If you want to know more about the John Deere 420 tractor, read its specifications, features, price, etc. in this article.

John Deere 420 Tractor Review

Features Of John Deere 420 Tractor

John Deere 420 is a popular utility tractor developed by Deere & Company in 1956. This powerful 2WD tractor was reborn in 1983. Here are the key features of the John Deere 420 model tractor.


After its rebirth in 1993, John Deere 420 model came equipped with an Onan B48G engine of 20 horsepower capacity. This 2-cylinder air-cooled gasoline engine has a displacement of 781 ccs and its bore stroke is 3.25×2.875 inches. The 12 volts engine has rated  RPM 3500  and its idle RPM is between 100-3450.

This engine was replaced in 1987 by the Onan P220G with a higher RPM rating of 3600.


This tractor uses Sundstrand 90 shaft-driven hydrostatic transmission system. The hydrostatic powered steering enables you to control the vehicle with ease. Its rear wheels are connected to the shoe and drum braking system. The tractor provides a forward speed of up to 12.4 km and a reverse speed of 6.2 km. It has a 4×2 2WD chassis with a transmission oil capacity of 7.1 L.


PTO enables the transmission of power from the engine to different attachments in a tractor. So your tractor cannot work properly without the right power take-off shaft.

In the John Deere 420 tractor, both front and rear PTOs are independent with an electric clutch. The front PTO speed is 3450 RPM while its rear PTO speed is 2000 RPM.


John Deere 420 tractor includes useful attachments supported by its 3 point hitch (front, mid and back hitches). The prime attachments are 50″ mid-mount mower deck, 60″ mid-mount mower deck, blade, tiller, front-end loader, and snowblower.

Manufacturing Year

The John Deere Tractor Company provides serial numbers to its models. This tells you the year and the month of production. You can find the manufacturing year from the table below.

  • 1983 – M00420X222001
  • 1984 – M00420X285001
  • 1985 – M00420X315001
  • 1986 – M00420X360001
  • 1987 – M00420X420001
  • 1988 – M00420X475001
  • 1989 – M00420X595001
  • 1990 – M00420X010001
  • 1991 – M00420X100001

Pros & Cons Of John Deere 420 Tractor


  • Its powerful 20 horsepower engine makes the tractor faster and enables you to work more in less time.
  • You can complete all your garden work seamlessly with this all-purpose tractor.
  • John Deere 420 offers a hydrostatic transmission system that enables power steering for easy movement.
  • The 2WD tractor has a reserve tank that allows 30 minutes of additional work time after the tractor is out of fuel.
  • The gearbox system of the tractor has 4 forward and 1 reverse speed.


  • Hand drive control of this tractor is difficult compared to a foot control system in other tractors.
  • It is a massive tractor and tough to navigate in tight spaces.

Price Of John Deere 420 Tractor

The Original Price of a 1956 manufactured John Deere 420 tractor was USD 3200. And a 1983 manufactured tractor price was USD 7000. The price of a used tractor is around USD 7000 and the accurate price depends on its condition and location.


John Deere 420 is a powerful 2WD utility tractor with a 20HP engine. It offers great features and useful attachments. This article includes all kinds of information about this model. Hopefully, the post will be helpful for you to know more about the John Deere 420 tractor model.

Technical Specifications

Engine Details
Engine Model: Onan B48G, Onan P220G
Bore and stroke: 3.25x2.875 inches [83 x 73 mm]
Engine type: air-cooled horizontal-shaft opposed-twin
Compression ratio: 7.0:1
Cylinders: 2
Horsepower: 20 hp [14.9 kW]
Fuel type: Gasoline
Starter: Electric
Fuel Capacity: 6.5 gal [24.6 L]
Coolant Capacity: 11 qts
Rated RPM: 3500
Displacement: 781 cc [47.7 ci]
Intake valve clearance: NA
Torque RPM: 1000-3450
Exhaust valve clearance: NA
Power Details
Drawbar (Claimed):​ NA
Drawbar (Tested): NA
PTO (Claimed): NA
PTO (Tested): NA
Belt (Claimed): NA
Belt (Tested): NA
Plows: NA
Transmission and Chassis​
Chassis: 2WD
Transmission type: Shaft-driven hydrostatic
Steering type: Power
Gears: Infinite forward and reverse (2-range)
Brakes: Shoe and drum (Rear wheels)
Speed: Forward: 10.0 Mph [16.1 Kmph] Reverse: 4.0 Mph [6.4]
Transmission model: Sundstrand 90
Transmission oil capacity: 7.5 qts [7.1 L]
Dimensions and Tires​
Wheelbase: 52 inches [132 cm]
Front tire: 18x8.50-8
Weight: 993 lbs [450 kg]
Rear tire: 26x12.00-12
Height: 47.5 inches [120 cm]
Height (Exhaust): NA
Hitch And Attachments​
Mower deck type: John Deere M01012
Mower deck size: 50 inches [127 cm], 60 inches [152 cm]
Mid mower deck: NA
Mid mower deck size: NA
Blade type: John Deere 0042M front-mount
Blade Width: 54 inches [137 cm]
Hitch type: Rear Type: 0
Attachment list: 50" mid-mount mower deck, 60" mid-mount mower deck, Snowblower, Blade, Front-end loader

Quick Overview:

John Deere
John Deere 420
Engine Type:
air-cooled horizontal-shaft opposed-twin
Transmission & Oil Capacity:
7.5 qts [7.1 L]
1983 - 1991
Fuel Type: